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2014/04/05

0520 Commence data acquisition. Start flashing for 1 hour followed by cooldown for 2 hours. Each bias set will consist of six 10-minute data series, interspersed by 6 seconds of flashing and 20 minutes of cooldown. Trace length 3.2768 ms, 400 μs delay, 2k events per file. Data acquired for following biases in order: +/-4 V; & -/+4 V. DIB3 kept at 0 V. Phonon OR trigger thresholds set at 25 ADC bins for all phonon channels, except DIB3 which has triggers thresholds of 8 ADC for all channels except channel D, which has threshold of 25 ADC. Ba-133 source mounted on dewar.
0535 Fill N2 cold trap full.
1530 Fill N2 cold trap full.
DAQ computer ran out of disk space during acquisition of last data series 07140405_1358. Fortunately, most data had already been acquired, and this was the last -/+4 V data set. Time to do some gardening.
1745 Commence helium transfer. Helium liquid level 19.4%.
1830 Cease helium transfer. Helium liquid level 92.0%.